he said i'm a loyal member of the anc. the world had changed and had to go away from the socialist philosophy. he changed radically in a very short amount of time. one of the things he always said to me, he was never high bound about haenging his mind. he said when circumstances change i changed my mind. what do you do. another great lesson for politicians. so he evolved so tremendously when he came out of prison. it was astonishing to watch. >> it is astonishing. incredible story. >> the transition between icon to being in power is one of those impossible things to do. >> it was much more difficult coming out of prison and being a practical politician than being in prison. mandela's greatest teacher said i haven't had a good night's sleep since i left prison because now have responsibility. >> in 1994 brian williams interviewed nelson mandela. he asked him about his predecessor f.w. de klerk. >> my relationship with mr. de klerk and he's one of those south africans that i hold in high regard. we have had differences where